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How to use installCoverageHooks method in Playwright Internal

Best JavaScript code snippet using playwright-internal

coverage.js

Source:coverage.js

...80}81/**82 * @param {string} browserName83 */84function installCoverageHooks(browserName) {85  const {api, events} = apiForBrowser(browserName);86  const coverage = new Map();87  const uninstall = traceAPICoverage(coverage, api, events);88  return {coverage, uninstall};89}90class CoverageEnv {91  /**92   * @param {string} browserName93   */94  constructor(browserName) {95    this.browserName = browserName;96  }97  /**98   * @param {import('folio').WorkerInfo} workerInfo99   */100  async beforeAll(workerInfo) {101    this.coverage = installCoverageHooks(this.browserName);102  }103  /**104   * @param {import('folio').WorkerInfo} workerInfo105   */106   async afterAll(workerInfo) {107    const { coverage, uninstall } = this.coverage;108    uninstall();109    const coveragePath = path.join(__dirname, '..', 'coverage-report', workerInfo.workerIndex + '.json');110    const coverageJSON = Array.from(coverage.keys()).filter(key => coverage.get(key));111    await fs.promises.mkdir(path.dirname(coveragePath), { recursive: true });112    await fs.promises.writeFile(coveragePath, JSON.stringify(coverageJSON, undefined, 2), 'utf8');113  }114}115module.exports = {...

checkCoverage.js

Source:checkCoverage.js

...16const path = require('path');17const fs = require('fs');18const {installCoverageHooks} = require('./coverage');19const browserName = process.argv[2] || 'chromium';20let api = new Set(installCoverageHooks(browserName).coverage.keys());21// coverage exceptions22if (browserName === 'chromium') {23  // Sometimes we already have a background page while launching, before adding a listener.24  api.delete('browserContext.emit("backgroundpage")');25}26if (browserName !== 'chromium') {27  // we don't have CDPSession in non-chromium browsers28  api.delete('browser.newBrowserCDPSession');29  api.delete('browser.startTracing');30  api.delete('browser.stopTracing');31  api.delete('browserContext.backgroundPages');32  api.delete('browserContext.serviceWorkers');33  api.delete('browserContext.newCDPSession');34  api.delete('browserContext.emit("backgroundpage")');...

Using AI Code Generation

1const { installCoverageHooks } = require('playwright/lib/server/coverage');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  installCoverageHooks(page);8  await page.coverage.startJSCoverage();9  const jsCoverage = await page.coverage.stopJSCoverage();10  console.log(jsCoverage);11  await browser.close();12})();13const { chromium } = require('playwright');14(async () => {15  const browser = await chromium.launch();16  const context = await browser.newContext();17  const page = await context.newPage();18  await page.coverage.startJSCoverage();19  const jsCoverage = await page.coverage.stopJSCoverage();20  console.log(jsCoverage);21  await browser.close();22})();23const { chromium } = require('playwright');24(async () => {25  const browser = await chromium.launch();26  const context = await browser.newContext();27  const page = await context.newPage();28  await page.coverage.startJSCoverage();29  const jsCoverage = await page.coverage.stopJSCoverage();30  console.log(jsCoverage);31  await browser.close();32})();33const { chromium } = require('playwright');34(async () => {35  const browser = await chromium.launch();36  const context = await browser.newContext();37  const page = await context.newPage();

Using AI Code Generation

1const { installCoverageHooks } = require('playwright/lib/server/coverage');2const { chromium } = require('playwright-chromium');3const path = require('path');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  installCoverageHooks(path.join(__dirname, 'coverage.json'), context);8  const page = await context.newPage();9  await page.close();10  await context.close();11  await browser.close();12})();13Now, we have to use the coverage file to generate the report. We will be using the [nyc](

Using AI Code Generation

1const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');2installCoverageHooks();3const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');4installCoverageHooks();5const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');6installCoverageHooks();7const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');8installCoverageHooks();9const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');10installCoverageHooks();11const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');12installCoverageHooks();13const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');14installCoverageHooks();15const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');16installCoverageHooks();17const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');18installCoverageHooks();19const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');20installCoverageHooks();21const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');22installCoverageHooks();23const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');24installCoverageHooks();25const { installCoverageHooks } = require('playwright/lib/server/cjs/test/coverage');26installCoverageHooks();27const { installCoverageHooks } = require('playwright/lib/server/cjs/test

Using AI Code Generation

1const { installCoverageHooks } = require('playwright/lib/server/coverage');2installCoverageHooks();3const { chromium } = require('playwright');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.close();9  await context.close();10  await browser.close();11})();12const { installCoverageHooks } = require('playwright/lib/server/coverage');13installCoverageHooks();14const { chromium } = require('playwright');15(async () => {16  const browser = await chromium.launch();17  const context = await browser.newContext();18  const page = await context.newPage();19  await page.close();20  await context.close();21  await browser.close();22})();23const { installCoverageHooks } = require('playwright/lib/server/coverage');24installCoverageHooks();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch();28  const context = await browser.newContext();29  const page = await context.newPage();30  await page.close();31  await context.close();32  await browser.close();33})();34const { installCoverageHooks } = require('playwright/lib/server/coverage');35installCoverageHooks();36const { chromium } = require('playwright');37(async () => {38  const browser = await chromium.launch();39  const context = await browser.newContext();40  const page = await context.newPage();41  await page.close();42  await context.close();43  await browser.close();44})();45const { installCoverageHooks } = require('playwright/lib/server/coverage');46installCoverageHooks();47const { chromium } = require('playwright

Using AI Code Generation

1const { installCoverageHooks } = require('playwright/lib/server/coverage');2const { createTestServer } = require('playwright/test');3const server = await createTestServer();4installCoverageHooks(server);5await server.listen(8080);6await page.coverage.startJSCoverage();7await page.coverage.stopJSCoverage();8await server.stop();9const { installCoverageHooks } = require('playwright/lib/server/coverage');10const { createTestServer } = require('playwright/test');11const server = await createTestServer();12installCoverageHooks(server);13await server.listen(8080);14await page.coverage.startJSCoverage();15await page.coverage.stopJSCoverage();16await server.stop();17const { test, expect } = require('@playwright/test');18test('Should generate coverage report for a file', async ({ page }) => {19  await page.coverage.startJSCoverage();20  await page.coverage.stopJSCoverage();21  const coverage = await page.coverage.stopJSCoverage();22  expect(coverage).toBeTruthy();23  expect(coverage.length).toBe(1);24  expect(coverage[0].text).toBeTruthy();25  expect(coverage[0].ranges.length).toBeGreaterThan(0);26});27const { test, expect } = require('@playwright/test');28test('Should generate coverage report for a file', async ({ page }) => {29  await page.coverage.startJSCoverage();30  await page.coverage.stopJSCoverage();31  const coverage = await page.coverage.stopJSCoverage();32  expect(coverage).toBeTruthy();33  expect(coverage.length).toBe(1);

Using AI Code Generation

1const { installCoverageHooks } = require("@playwright/test");2installCoverageHooks(globalThis);3const { coverage } = require("@playwright/test");4const coverageObject = await coverage.startJSCoverage();5await coverage.stopJSCoverage(coverageObject);6module.exports = {7    {8      globalSetup: require.resolve("./globalSetup.js"),9    },10};11const { chromium } = require("playwright");12module.exports = async () => {13  const browser = await chromium.launch();14  const context = await browser.newContext();15  globalThis.browser = browser;16  globalThis.context = context;17};18module.exports = async () => {19  await globalThis.context.close();20  await globalThis.browser.close();21};22{23  "scripts": {24  },25  "devDependencies": {26  }27}28const { coverage } = require("@playwright/test");29const coverageObject = await coverage.startJSCoverage();30await coverage.stopJSCoverage(coverageObject);31const { coverage } = require("@playwright/test");32const coverageObject = await coverage.startJSCoverage({33    {34    },35});36await coverage.stopJSCoverage(coverageObject);

Using AI Code Generation

1const { installCoverageHooks } = require('playwright/lib/server/coverage');2installCoverageHooks();3const { chromium } = require('playwright');4const browser = await chromium.launch();5const { chromium } = require('playwright');6const browser = await chromium.launch();7const { chromium } = require('playwright');8const browser = await chromium.launch();9const { chromium } = require('playwright');10const browser = await chromium.launch();11const { chromium } = require('playwright');12const browser = await chromium.launch();13const { chromium } = require('playwright');14const browser = await chromium.launch();15const { chromium } = require('playwright');16const browser = await chromium.launch();17const { chromium } = require('playwright');18const browser = await chromium.launch();19const { chromium } = require('playwright');20const browser = await chromium.launch();21const { chromium } = require('playwright');22const browser = await chromium.launch();23const { chromium } = require('playwright');24const browser = await chromium.launch();25const { chromium } = require('playwright');26const browser = await chromium.launch();

Using AI Code Generation

1const { installCoverageHooks } = require('playwright/lib/server/coverage');2installCoverageHooks();3const playwright = require('playwright');4const coverage = await globalThis.__coverage__;5fs.writeFileSync('coverage.json', JSON.stringify(coverage));6const browser = await playwright.chromium.launch();7const context = await browser.newContext();8const page = await context.newPage();9await page.coverage.startJSCoverage();10await page.coverage.stopJSCoverage();11await browser.close();12const { chromium } = require('playwright');13const fs = require('fs');14(async () => {15  const browser = await chromium.launch();

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.